From a Contact record, use the activity or icon for New Temp Job and choose Temp Shift Job.

Choose the Job category for the job being created. The Job title is generated from this information but is editable.

Confirm whether a break is paid, then ensure the Rate Time Definition Type of No RTD is selected, using New Job Rates under Which Rates to use?
​Note: Check which RTD to use here.

Add in the Primary Job Category and any other information, then select Next to add in the rates required. Once done select Create Job.

For details on creating Temp Shift Jobs using RTDs, please refer to the article here.